. "Astronomical observatories" . . . "astronomical" . . "ground-based astronomical observatory" . "observatory and computer" . . "observatory" . . . . . . . . . "observing locations" . . . "people's observatory" . . . . . "scientific and military facility" . . "Observatory" . . . "Astronomical Equipment" . "astronomical observatories" . "optical observatory" . . . . "obzervatorys" . "ground-based" . . . "housing large telescopes" . . . . "Astronomical observatory" . . "Ground-based observatory" . . . . . . . . . . . "Observatory" . . . "observing facility" . "observatories" . "Astronomical Observatory" . . . "ground-based observatories" . . . "dome" . . "astronomical observation station" . . . . "Observatories" . "Coats Observatory" . . . . "astronomical observatory" . . "meteorological observatory" . "public observatory" . . "sky observatory" . "Earth-bound observers" . "Observatory*" . "observation" . "Observatoire" . . . "observatory building" . "astronomical observation" .